RSIC-1 EXT04 - Clip with Additional Drop

RSIC-1 EXT04 - Clip with Additional Drop

The RSIC-1 EXT04 Clip is comparable to our RSIC-1 Resilient Sound Isolation Clip however, it is designed for use where additional drop for HVAC, Plumbing or Electrical Chases is needed. These clips give you the flexibility to drop a ceiling as much as 4” from its original height, while retaining superior performance.


Quantity Discounts start at 100 Pieces. See below for details. FREE SHIPPING applies to orders over $75.00!

Price: $8.72
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Made in USA
Quantity Price
100+ Items $7.99

The RSIC-1 EXT04 Resilient Sound Isolation Clip is designed for use where additional drop for HVAC, Plumbing or Electrical Chases is needed.

Product Features:

  • These clips give you flexibility to drop a ceiling as much as 4" from original height
  • Also great for leveling out uneven floor joists
  • Clips is composed to two components: An L Bracket attached to our standard RSIC-1 Sounproofing Clip
  • Very popular within Home Theater applications. It creates a allowing an open chase for the new wires, all while retaining superior acoustical performance

Product Specification:

  • Acoustical Design Load: 36 Lbs.
  • Cavity Minimum: ½”
  • Cavity Maximum: 4”
  • Use on Ceilings: Yes
  • Use on Walls: No
  • New Construction: Yes
  • Retrofit Construction: No
  • See Product Data Sheet for more information

This product should not be used on walls or in retrofit construction. For a similar product with more versatility, see our RSIC-1 Soundproofing Clip.

How Many Do I Need?

  • For a tight estimate, when spaced at 48" x 24": Take the square footage of the area to be treated and divide by 5.
  • However, to compensate for being within 6" to the walls / ceilings, we have found that calculating 23% of your total square footage will give you a more accurate estimate.

Special Quantity Discounts start at 100 Clips, see information above for details. Free Shipping applies to orders over $75.00 and above. See our Shipping / Return Tab to the right.

Product Data

How it Works:

RSIC Clips and Hat Channels / Furring Channels are used in the process of decoupling walls and/or ceilings from the joists or studs, creating what is called a floating wall or ceiling. Decoupling the wall or ceiling helps create a soundproof environment in two ways; by breaking the path and by creating resiliency.

In wall assemblies, the Clips are generally spaced every 48” OC, making the contact between the studs and boards minimal. This break in the path greatly reduces, in two ways, the amount of noise that travels from one side to the other. Firstly, there is no direct connection for sound to travel via the joists as the wall/ceiling is disconnected. Secondly, the wall and ceiling are given resiliency (flexibility), thus greatly reducing vibration (similar to shock springs on a car).

Printable Documents:

Product Specs:

Product Specifications:

RSIC-EXT04 Product Specification

Sample Applications:

Installation Guide

Click to Print Installation Guide

General Installation Information:


Required Screws for RSIC-EXT04 Installation

Compatible Hat Channel for RSIC-EXT04 Clip

Approved Fasteners

  • RSIC-DC04 to Wood: #8 x 1-1/2 inch minimum size coarse thread screw. (Recommended #12 or #10 x 1-1/2inch hex head)
  • RSIC-DC04 to Steel: # 8 x 1inch minimum size fine thread screw. (Recommended #12 or #10 x 1-5/8 inch hex head)
  • DO NOT fasten Resilient Sound Isolation Clips (RSIC-EXT04) to framing members with nails. Use only approved fasteners

Compatible Hat / Furring Channel:

  • Minimum Requirements: 25 Gauge, Hemmed edge detail required on all 25 gauge furring channel. Meets or exceeds SSMA min. requirements.
  • Depth: 7/8 inch
  • Width Bottom: 2-9/16” to 2-11/16” inch wide nominal.
  • Width Top: 1-1/4 inch wide
  • Splicing: Splice drywall furring channel (hat track) with 6 inch overlap in mid span (between two clip). Secure with 18 Gauge tie wire, or two 7/16” framing screws
  • Compatible Hat / Furring Channels can be purchased by selecting link.

Average Labor Rates:

  • RSIC-1 EXT04: 60 clips per man hour
  • Drywall Hat / Furring Channel: 550LF per man hour
*Labor rates provided to manufacturer by independent contracting firm

Recommended Layouts:


For Ceiling System Framing at 24” OC

For 1 or 2 Layers of 5/8” Gypsum Board with Clips at 24” x 48” OC:

Suggested Layout for RSIC-EXT04, 24" OC Framing  

For Ceiling System Framing at 16” OC

For 1 or 2 Layers of 5/8” Gypsum Board with Clips at 24” x 48” OC:

Suggested Layout for RSIC-EXT04, 16" OC Framing  

For Ceiling System Framing at 24” OC

For 3 Layers of 5/8” Gypsum Board with Clips at 16” x 48” OC:

Suggested Layout for RSIC-EXT04, 24" OC Framing  

For Ceiling System Framing at 16” OC

For 3 Layers of 5/8” Gypsum Board with Clips at 16” x 48” OC:

Suggested Layout for RSIC-EXT04, 16" OC Framing



Installation on Ceilings with 1-2 Layers 5/8" Gypsum Board:


Installation Guide for RSIC-EXT04 Clip

Installation Guide for RSIC-EXT04 Clip


  • RSIC-1 EXT04 shall be 48” OC maximum. (Perpendicular to Joist/Truss)
  • Fasten the Clips to the side of the structural members with approved fasteners, see above.
  • Ensure the metal “L” bracket is tight to the framing member.
  • Ensure the location of the first row clips is within 8” of the wall at each end of a run.
  • Snap in the drywall furring channel (hat track) into the Clip at right angles (perpendicular or parallel) to the framing members.
Important Notes:
  • Resilient Sound Isolation Clip (RSIC-EXT04) ceiling system shall not carry heavy loads such as cabinets or bookshelves
  • Seal all potential air leaks with non-hardening acoustical caulking to achieve best noise control results. Use fire rated sealant where required.
Shipping & Returns

Shipping and Return information is specific to this product page only (not for other products on our site).

  • Shipping:
    • Product is in stock and usually ships within 48 Hours.
    • FREE SHIPPING on orders over $75.00. There will be a flat $14.99 shipping and handling fee on orders under $75.00. - Applies to orders shipped within the USA (excluding Alaska and Hawaii).
    • Ships via major carriers, such as UPS or FedEx Ground, with tracking information provided.
  • Returns:
    • Product may be returned up to 60 days if in brand new condition.
    • A $10.00 fee will be charged to cover or original shipping cost.
    • Please call or email us to receive an RMA number before returning. No returns will be processed without an RMA number.
    • Return shipping is customer's responsibility. A return address will be provided with RMA#.
    • If you are shipping via USPS (not recommended) do NOT require signature as we will not be able to pick up your package from local post office facility.
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Customers Questions and Answers

1) james: Do you have a ceiling diagram for the RSIC-1 EXT04 running parallel like in one of the pictures on your site, where a 2X4 is attached to the lower part of a joist. I need to do my ceiling this way to levvel and not lose that much height to my ceiling.

Trademark Soundproofing Reply: Hi James, We do not, however it is just a matter of turning the bottom clip. Keep in mind that you will save even more space by keeping it parallel.